摘要:
function load_js(src) { var xml_http = window.ActiveXObject ? new ActiveXObject("Microsoft.XMLHTTP") : new XMLHttpRequest(); xml_http.onreadystatechange = function() { if (xml_http.readyState == 4) { var script_element = document.createElement(... 阅读全文
摘要:
1.查询表内重复的字段select id from table1 where id in(select id from table1 group by id having count(id)>1)2.select查询添加自增长的列 作为标识列例子:Select (Select sum(1) from Table1 where ID 1过滤重复数据SELECT * FROM tablename GROUP BY colname HAVING COUNT(*) = 1http://blog.csdn.net/zhoujiaoshou/article/details/7928351====== 阅读全文